Glenn McDonald (born March 18, 1952) is a retired American professional basketball player. He played three seasons for the Boston Celtics and the Milwaukee Bucks before going overseas most notably in the Philippines, with the U/Tex Wranglers in the early-80's. He averaged 4.2 points in 146 games played in his NBA career.
He played a huge role in Game 5 of the 1976 NBA Finals, scoring eight points in the third overtime period as the Celtics won 128-126 before eventually winning the championship in six games.
In the Philippines, McDonald was instrumental in U/Tex's 1980 PBA Open Conference championship against Toyota Tamaraws. He scored two free-throws to send the fifth game into overtime after Toyota led by four with 16 seconds left in regulation. U/Tex eventually won the championship, 99-98.
In 1981, he became the head coach of the U/Tex franchise. McDonald was also the Long Beach State 49ers' head coach in the early 1990s and was an assistant coach for the Los Angeles Sparks of the WNBA.